From Schools Superintendent Arlene Ackerman and District Attorney Seth Williams to children’s advocate Shelly Yanoff, speakers told a state Senate committee yesterday that getting parents involved is crucial to reducing youth violence. They praised Sen. Anthony H. Williams’ proposed parent-accountability bill that would provide legal leverage to educate parents about their responsibilities and help stem juvenile crime. But some criticized the draft language and raised questions about sections calling for fines or jail time for some parents if their children commit crimes. Lee mas…